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Method for preparing C5, C6 alkane by converting acidic biomass-based sugar alcohol solution

An acidic sugar alcohol, biomass technology, applied in the field of catalysis, can solve the problems of catalyst development and application obstacles, poor catalyst stability, aluminum loss, etc., to achieve good reactivity and stability, strong selective adsorption performance, strong hydrophobicity Effect

Active Publication Date: 2016-01-27
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in a hydrothermal environment, silica-alumina oxides or molecular sieves face problems such as insufficient hydrothermal stability and aluminum loss, resulting in poor catalyst stability, which is a major obstacle to the development and application of catalysts.
On the other hand, the main method of preparing sugar alcohol from biomass raw materials is through acid hydrolysis, and the general downstream treatment needs to be neutralized by alkali, which will increase the energy consumption of the neutralization process of downstream treatment and the water pollution caused by waste acid

Method used

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  • Method for preparing C5, C6 alkane by converting acidic biomass-based sugar alcohol solution
  • Method for preparing C5, C6 alkane by converting acidic biomass-based sugar alcohol solution

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Embodiment 1

[0031] A method for converting acidic biomass-based sugar alcohol solution to produce C5, C6 alkanes, characterized in that it comprises the following steps:

[0032] (1) Preparation of Ru / C catalyst: Weigh 5g of activated carbon (70-120 mesh) into a round bottom flask, then slowly add 100mL of deionized water and a stirring magnet, then condense the reflux device on the round bottom flask, put the whole Heat in an oil bath and maintain magnetic stirring at 450 rpm, and treat at a constant temperature of 90°C in an oil bath for 5 hours. Then cool to normal temperature, filter and wash, the filter cake is washed 3 times with deionized water, and then put into a drying oven at 120° C. to dry overnight to obtain an activated activated carbon carrier. Then take 4mL (2g) to handle the activated carbon carrier particles (Tangshan Huaneng Technology Carbon Industry Co., Ltd., model HN-Y14, 70-120 mesh), impregnate ruthenium trichloride (Ru content 37%, RuCl 3 .xH 2 (0:0.22g) soluti...

Embodiment 2

[0040] A method for converting an acidic biomass-based sugar alcohol solution to produce C5, C6 alkanes, is characterized in that it comprises the following steps:

[0041](1) Preparation of Ru / C catalyst: Weigh 5g of activated carbon (70-120 mesh) into a round bottom flask, then slowly add 100mL of deionized water and a stirring magnet, then condense the reflux device on the round bottom flask, put the whole Heat in an oil bath and maintain magnetic stirring at 450 rpm, and treat at a constant temperature of 90°C in an oil bath for 5 hours. Then cool to normal temperature, filter and wash, the filter cake is washed 3 times with deionized water, and then put into a drying oven at 120° C. to dry overnight to obtain an activated activated carbon carrier. Then take 4mL (2g) to handle the activated carbon carrier particles (Tangshan Huaneng Technology Carbon Industry Co., Ltd., model HN-Y14, 70-120 mesh), impregnate ruthenium trichloride (Ru content 37%, RuCl 3 .xH 2 (0:0.22g) s...

Embodiment 3

[0049] A method for converting an acidic biomass-based sugar alcohol solution to produce C5, C6 alkanes, is characterized in that it comprises the following steps:

[0050] (1) Preparation of Ru / C catalyst: Weigh 5g of activated carbon (70-120 mesh) into a round bottom flask, then slowly add 100mL of deionized water and a stirring magnet, then condense the reflux device on the round bottom flask, put the whole Heat in an oil bath and maintain magnetic stirring at 450 rpm, and treat at a constant temperature of 90°C in an oil bath for 5 hours. Then cool to normal temperature, filter and wash, the filter cake is washed 3 times with deionized water, and then put into a drying oven at 120° C. to dry overnight to obtain an activated activated carbon carrier. Then take 4mL (2g) to handle the activated carbon carrier particles (Tangshan Huaneng Technology Carbon Industry Co., Ltd., model HN-Y14, 70-120 mesh), impregnate ruthenium trichloride (Ru content 37%, RuCl 3 .xH 2 (0:0.22g) ...

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Abstract

The invention relates to a method for preparing C5, C6 alkane by converting an acidic biomass-based sugar alcohol solution. The method comprises the steps of 1, conducting heat treatment on a catalyst carrier, conducting filtration, washing and drying, conducting equivalent-volume impregnation on a ruthenium trichloride solution, keeping ruthenium content to be 2-10 wt%, conducting ultrasonic treatment or stirring for 1-8 h, conducting drying at 80-150 DEG C, and then conducting roasting at 300-420 DEG C in the presence of nitrogen or argon so that the Ru / C catalyst can be obtained; 2, conducting acid treatment on a sugar alcohol solution to obtain an acidic sugar alcohol solution, and conducting acid hydrolysis on biomass materials to obtain acidic biomass hydrolysate, wherein the pH value of the acidic sugar alcohol solution and the pH value of the acidic biomass hydrolysate are 1.0-5.0; 3, adding the solutions obtained in the step 2 to a trickle bed reactor, and obtaining C5, C6 alkane after sugar alcohol in the solutions reacts with the catalyst. According to the method, the preparing process is conducted at low temperature and low pressure, energy consumption is low, the process is easy to control, and industrialized application prospects are broad.

Description

technical field [0001] The invention belongs to the field of catalysis and chemical technology, and in particular relates to a method for preparing C5 and C6 alkanes by converting an acidic biomass-based sugar alcohol solution. Background technique [0002] Although fossil resources such as petroleum, coal, and natural gas are still the main sources of liquid fuels, they have obvious resource dependence. The increasingly serious supply situation of fossil resources and the increasingly serious environmental problems force us to look for new resources that can replace or supplement the current energy pattern. At present, biomass resources are considered to be the best choice to replace fossil resources. Sugar alcohol raw materials are mainly derived from the hydrolysis or fermentation of biomass raw materials. They are considered to be a new generation of biomass energy platform compounds. Hydrogen, alkanes and chemicals can be synthesized through catalytic oxygenation and de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C9/15C07C1/20B01J23/46
Inventor 王铁军翁育靖马隆龙仇松柏陈伦刚张琦
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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